bluestudy.dk

📜 Historical scan 2026-06-16 15:05:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

bluestudy.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 18 April 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.simply.com. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 165ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	—	—	—
ns2.simply.com	—	—	—
ns3.simply.com	—	—	—
ns4.simply.com	—	—	—

🌍 A Records#

1 records 117ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.103.180	—	linux159.unoeuro.com	AS48854	—	—	—	—

📧 MX Records#

1 records 247ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx.simply.com	94.231.106.20	mx.simply.com	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 319ms

TXT Record
v=spf1 a mx include:_spf.mlsend.com ?all

✉️ SPF#

Policy	Record (bluestudy.dk)
?all (neutral)	v=spf1 a mx include:_spf.mlsend.com ?all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-11 21:29:16

www	94.231.103.180 (AS48854) (address records, no CNAME)
www vs bare domain	Same network bluestudy.dk: 94.231.103.180 (AS48854) www.bluestudy.dk: 94.231.103.180 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ?all

warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

2 records 90ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	A9D603AF4D7ED6B9246B4B68500CD6F2…
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	97A3BA009F39C761BFFB6574340E8138…

🔐 DNSSEC#

350ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

156ms

Field	Value
Serial	2025042300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-07 11:49:40

Field	Value
Registrar	Simply.com A/S
Registered	2018-04-18
Expires	2027-04-30 (195d)

📋 WHOIS#

⏱️ Lookup Timing#

165ms

117ms

247ms

AAAA

153ms

TXT

319ms

CAA

124ms

HTTPS

134ms

TLSA

90ms

SOA

156ms

MTA-STS

225ms

DNSSEC

350ms

SRV

0ms

Total

1477ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 16:35:08	771ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-26 15:41:55	520ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-20 12:22:18	518ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 15:05:48 shown	1477ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 15:03:08	2630ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 15:01:30	487ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 15:00:05	674ms	4 NS 1 A 1 MX	🔒 Secure